Rounded thoracic spine at start
Lifter slumps forward instead of hinging from the hips.
Overactive muscles
Pec major / minorUpper trapeziusLatissimus dorsi
Corrective work
Foam RollPectorals↗Foam RollThoracic spine↗StretchDoorway pec stretch↗Lifter slumps forward instead of hinging from the hips.
Lower back rounds; lifter rocks backward to row the weight.
Upper traps shrug instead of mid-traps & rhomboids retracting.